<?php
/**
 * Created by PhpStorm.
 * User: clkj1
 * Date: 2018/6/28
 * Time: 16:35
 */
if (isset($_GET['jback'])){
    $jback = base64_decode($_GET['jback']);
    header("Location:".$jback);
}else{
    echo '<script>alert("非法访问"); history.go(-1);</script>';
}